3A, LMD18200 55V H-Bridge
April 2005
LMD18200 3A, 55V H-Bridge
General Description
The LMD18200 is a 3A H-Bridge designed for motion control applications. The device is built using a multi-technology process which combines bipolar and CMOS control circuitry with DMOS power devices on the same monolithic structure. Ideal for driving DC and stepper motors; the LMD18200 accommodates peak output currents up to 6A. An innovative circuit which facilitates low-loss sensing of the output current has been implemented. n n n n n n No "shoot-through" current Thermal warning flag output at 145C Thermal shutdown (outputs off) at 170C Internal clamp diodes Shorted load protection Internal charge pump with external bootstrap capability
Applications
n n n n n DC and stepper motor drives Position and velocity servomechanisms Factory automation robots Numerically controlled machinery Computer printers and plotters
Features
n n n n Delivers up to 3A continuous output Operates at supply voltages up to 55V Low RDS(ON) typically 0.3 per switch TTL and CMOS compatible inputs
Functional Diagram
01056801
FIGURE 1. Functional Block Diagram of LMD18200
2005 National Semiconductor Corporation
DS010568
www.national.com
LMD18200
Connection Diagrams and Ordering Information
01056802
11-Lead TO-220 Package Top View Order Number LMD18200T See NS Package TA11B
01056825
24-Lead Dual-in-Line Package Top View Order Number LMD18200-2D-QV 5962-9232501VXA LMD18200-2D/883 5962-9232501MXA See NS Package DA24B
www.national.com
2
LMD18200
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Total Supply Voltage (VS, Pin 6) Voltage at Pins 3, 4, 5, 8 and 9 Voltage at Bootstrap Pins (Pins 1 and 11) Peak Output Current (200 ms) Continuous Output Current (Note 2) Power Dissipation (Note 3) VOUT +16V 6A 3A 25W 60V 12V
Power Dissipation (TA = 25C, Free Air) Junction Temperature, ...
LMD18200